Clam-shell bucket



Jan. 31,1928.

E. L. HA BBINGTON CLAM SHELL BUCKET Filed Sept. 25 31924 2 Sheets-Sheet 1 Jim. 31,1928.

" 1,657,926 E. L. HARRINGTON CLAM SHELL BUCKET Filed Sept. 25, 1924 2 Sheets-Sheet 3 Patented Jan. 31, 1928.

EDWARDL. HARRINGTON, OFERIE, PENNSYLVANIA; ASS IGNOR TO G. WILLIAMS COMPANY, or ERIE, PENNS LVANI A CORPORATION OF PENNSYLVANIA.

cram-SHELL B C ET.

Application filed September 25, Serial No. 739,940.

have been cast and sometimes fabricated but there are disadvantages in the diiierent constructions. In the present 1nvention I :tabricate this head of ordinary metal plates and rigidly secure these plates together by clamping bolts, the plates being separated by distance sleeves on the bolts. I carry the clamping action through the different pins on which the sheaves are mounted by supplying such pins with distance sleeves and clamp the same. Further I bend the corner irons which are made rigid with the head so as to bring a portion of said irons parallel with the plates forming the head, thus providing a rigid and durable head and at the same time one that may be very cheaply constructed. Features of the invention will appear from the specification and claims.

The invention is illustrated in the accompanying drawings as follows Fig. 1 shows a side elevation of the clam shell.

Fig. 2

means.

Fig. 3 an end elevation.

Fig. 1 an enlarged section on the line -l-l in Fig. 6.

Fig. a section on the line 55 in Fig. 6.

Fig. 6 a side elevation of the head.

Fig. 7 an end elevation of the head.

1 marks one scoop member, 2 the other scoop member, 3 and 4 the pivot arms on the scoop members, 5 the hinge pin of the scoop members, 6 an opening lever locked with the arms 3, 7 a closing sheave on the opening lever, 8 a pin on which thesheave is mounted, 9 a second sheave on the lever, and 10 a pin on which the sheave 9 is mounted. The head is made up of two metal side plates 11 having depending brackets 12 at each side a detail view of the clamping of the side bars, these brackets being simply a formed to extend the plate 11 and secured thereto by riveting or any convenient means. Pins 14; extend through corner bars 15 and the plates 11. The corner bars are secured to the scoop member 1 by pins 16. and to the bracket plate 12 by securing means'17. Sev eral of these clamping means are used in the structure and involve a bolt 18' extending through the side plates or bracket and a dis tance sleeve 19 between such plates. A

washer 13 is arranged between the ends of the bars 15 and the plates 11 corresponding in thickness to the plate 12. A distance piece 20 in the form oia cable guide is arranged on the pin 14 between the plates 11. 'Corner. bars 21 are arranged on the pins at the outside oi ihe bars 15. Distance sleeves 22 are arranged on the pins lei and extend through the bars 21 forming a clamping means be tween the head 23 of the pin 14 and a nut 24:. It will readily be seen that by drawing up the nut the whole system may be'clamped, the bars 21 being journaled on the sleeves 22. Washers 25 may be arranged between the bars 21 and the bars 15.

The plates 11 areclamped together by a clamping means 27 and 28, these clamping means corresponding to those shown in Fig. 2. p a

A sheave 29 is journaled on the distance sleeve 30 between the plates 11 and the plates are clamped together on this sleeve by the bolt or pin 31. A sheave 32 is journaled on the distance sleeve 33 and the plates clamped together on this sleeve by the bolt 33.

A lifting cable 341 is secured to a clamp ing means 35, the distance piece in the clamping means being in the form of a spool similar to thespool 37 shown in Fig. 5. The closing cable extends around the guide sheave 32, the closing sheave 9 on the closing lever, the sheave 29, sheave 7 and is se cured to the spool 37 arranged on a pin 36 between the brackets 12.

The operation of the clam shell will be readily understood in that'it operates in a manner common to clam shells nowinv use. It will be noted that by this construction a very rigid and durable head is fabricated in a very cheap and eflicient manner and that the corner bars which are rigid with the head are secured thereto and tend to brace the head by having aportion of the bars parallel with the plates forming the head.

It will be noted that where the distance sleeve, as 30, or 33, is arranged around the pin it protects the pin from wear and all that is necessary to renew with excessive wear is the distance piece. It will be understood further that in many places these sheaves where they operate under rather severe conditions must be made or bushed of material standing such use as manganese steel. .Underthese conditions the pins may be made of ordinarymaterial and it is only head; corner bars pivotally mounted on the pin outside of the first-mentioned corner bars and extending to the other scoop member; and clamping means on the pin extending through the pivotally mounted corner bars.

2. In a clam shell bucket, the combination of connected scoop members; a head comprising parallel plates of uniform thickness; a closing sheave arranged between the side plates; a distance sleeve on which the sheave is journaled; a clamping pin extending through the plates and sleeve; corner bars rigidly secured to the head; a pin extending through said corner bars and side plates; a distance piece 011 said last-mentioned pin between the side plates; :1 second set of corner bars pivoted on said last-mentioned pin; and means for clamping the side plates on said last-mentioned distance piece through said last-mentioned pin.

In testimony whereof I have hereunto set my hand.

ED\VARD L. HARRINGTOX. 

